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Re: [PATCH] target/mips: Fix address space range declaration on n32


From: Richard Henderson
Subject: Re: [PATCH] target/mips: Fix address space range declaration on n32
Date: Sun, 27 Mar 2022 20:40:40 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0

On 3/26/22 23:34, WANG Xuerui wrote:
This bug is probably lurking there for so long, I cannot even git-blame
my way to the commit first introducing it.

Anyway, because n32 is also TARGET_MIPS64, the address space range
cannot be determined by looking at TARGET_MIPS64 alone. Fix this by only
declaring 48-bit address spaces for n64, or the n32 user emulation will
happily hand out memory ranges beyond the 31-bit limit and crash.

Confirmed to make the minimal reproducing example in the linked issue
behave.

Closes:https://gitlab.com/qemu-project/qemu/-/issues/939
Signed-off-by: WANG Xuerui<xen0n@gentoo.org>
Cc: Philippe Mathieu-Daudé<f4bug@amsat.org>
Cc: Aurelien Jarno<aurelien@aurel32.net>
Cc: Jiaxun Yang<jiaxun.yang@flygoat.com>
Cc: Aleksandar Rikalo<aleksandar.rikalo@syrmia.com>
Cc: Andreas K. Hüttel<dilfridge@gentoo.org>
---
  target/mips/cpu-param.h | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

This is what I was expecting, when I read the issue report.
Thanks,

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~



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